Electronics Forum | Wed Apr 16 10:45:16 EDT 2003 | Takfire
Recent cross-section analysis for a customer complaint revealed voiding in the solder fillet. In some cases, the remains of outgassing were also observed. During the failure analysis, we also observed failures where the solder fillet wicked on the
Electronics Forum | Tue Jul 15 11:18:29 EDT 2003 | slthomas
It is an interesting situation....one that merits as much business philosophy analysis as technical analysis. I'll be getting my official 60 day notice today. Any criticism about our overseas suppliers (that were selected by sr. management w/o in
Electronics Forum | Wed Apr 16 13:19:13 EDT 2003 | Takfire
Thanks Russ! The origianal complaint from the customer was in regards to what appeared as "bumpy" appearance and "holes" in the solder fillet. This problem was originally presented as an appearance issue only. Further investigation by our DPA lab r
Electronics Forum | Wed Apr 16 11:20:31 EDT 2003 | russ
What was the original complaint? when you say solder wicked onto top of capacitor do you mean it was dewetted from the board and only on the cap? What type of device showed voiding? how bad was it 20%,50%? I have found that the paste type seems to
Electronics Forum | Thu Apr 17 17:38:57 EDT 2003 | Takfire
Dave, I am not exactly sure what is driving them to believe that this is a capacitor issue. It is unfortunate, that this belief has slowed their activity in further understanding their manufacturing process. The caps are BME (Base Metal Electrode
Electronics Forum | Wed Jul 02 12:42:58 EDT 2003 | slthomas
Not sure how else to describe this. We've received some boards (1/2" x 3.5" x .0325" board built on panels of 24) with numerous resistors showing separation of the solder from the metallization at the top of the joint. There are 26 0805's on the bo
Electronics Forum | Wed Apr 16 16:55:38 EDT 2003 | russ
Thanks for the info, Here is a couple more questions (and you thought you were done) What size are these caps /res? how thick is your stencil? what type of oven are you using? what is the finish of the board? Anyway, it seems like (from a distance)t
Electronics Forum | Mon Dec 11 14:30:46 EST 2023 | proy
We all know that purity of nitrogen is critical for selective soldering. When it comes to wave solder- how much or what percentage reduction in oxygen is enough to make a difference in 1) at least reducing dross buildup and 2) being anble to cut ba
Electronics Forum | Tue Jul 01 22:26:05 EDT 2008 | davef
Why do you want to increase the strength of the solder connection? Our experience shows that a proper solder connection has more strength than the strength of the pad to the laminate.
Electronics Forum | Wed Jul 02 08:06:10 EDT 2008 | ck_the_flip
Yes, your strength of the joint is in the intermetallic, and not additional solder. Solder ain't like duct tape, where the more you put, the better it'll hold.
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